Topeka, KS 66614 Frost Dates
66614, near Topeka, KS: the frost window
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/21, roughly 185 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Topeka in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Topeka's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Topeka against the rest of the dataset
At roughly 185 frost-free days, Topeka places 23,013 of 40,283 ZIP codes in this dataset. Within KS, it ranks 407 of 745.
Learn more
Two guides worth reading on 66614: the frost range, on how to read the range around Topeka's dates instead of trusting one, and local microclimates, on what one yard in Topeka can differ from the 66614 normal.